High Pt Suppression at Forward Rapidities in d+Au and Au+Au at Sqrt(s)=200 GeV

We present centrality dependent charged hadron yields at several pseudorapidities from Au+Au collisions at Sqrt(s)=200GeV measured with BRAHMS spectrometers. Nuclear modification factors RAA and RCP for charged hadrons at forward angles in Au+Au and d+Au collisions at RHIC will be discussed.